path: root/libempathy-gtk/empathy-cell-renderer-expander.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2006-2007 Imendio AB
 * Copyright (C) 2007-2011 Collabora Ltd.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 *
 * Authors: Kristian Rietveld <kris@imendio.com>
 */

#include <gtk/gtk.h>

#include <libempathy/empathy-utils.h>
#include "empathy-cell-renderer-expander.h"

#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyCellRendererExpander)
typedef struct {
    GtkExpanderStyle     expander_style;
    gint                 expander_size;

    guint                activatable : 1;
} EmpathyCellRendererExpanderPriv;

enum {
    PROP_0,
    PROP_EXPANDER_STYLE,
    PROP_EXPANDER_SIZE,
    PROP_ACTIVATABLE
};

static void     empathy_cell_renderer_expander_get_property (GObject                         *object,
                                guint                            param_id,
                                GValue                          *value,
                                GParamSpec                      *pspec);
static void     empathy_cell_renderer_expander_set_property (GObject                         *object,
                                guint                            param_id,
                                const GValue                    *value,
                                GParamSpec                      *pspec);
static void     empathy_cell_renderer_expander_finalize     (GObject                         *object);
static void     empathy_cell_renderer_expander_get_size     (GtkCellRenderer                 *cell,
                                GtkWidget                       *widget,
                                const GdkRectangle              *cell_area,
                                gint                            *x_offset,
                                gint                            *y_offset,
                                gint                            *width,
                                gint                            *height);
static void     empathy_cell_renderer_expander_render       (GtkCellRenderer                 *cell,
                                cairo_t *cr,
                                GtkWidget                       *widget,
                                const GdkRectangle              *background_area,
                                const GdkRectangle              *cell_area,
                                GtkCellRendererState             flags);
static gboolean empathy_cell_renderer_expander_activate     (GtkCellRenderer                 *cell,
                                GdkEvent                        *event,
                                GtkWidget                       *widget,
                                const gchar                     *path,
                                const GdkRectangle              *background_area,
                                const GdkRectangle              *cell_area,
                                GtkCellRendererState             flags);

G_DEFINE_TYPE (EmpathyCellRendererExpander, empathy_cell_renderer_expander, GTK_TYPE_CELL_RENDERER)

static void
empathy_cell_renderer_expander_init (EmpathyCellRendererExpander *expander)
{
    EmpathyCellRendererExpanderPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (expander,
        EMPATHY_TYPE_CELL_RENDERER_EXPANDER, EmpathyCellRendererExpanderPriv);

    expander->priv = priv;
    priv->expander_style = GTK_EXPANDER_COLLAPSED;
    priv->expander_size = 12;
    priv->activatable = TRUE;

    g_object_set (expander,
              "xpad", 2,
              "ypad", 2,
              "mode", GTK_CELL_RENDERER_MODE_ACTIVATABLE,
              NULL);
}

static void
empathy_cell_renderer_expander_class_init (EmpathyCellRendererExpanderClass *klass)
{
    GObjectClass         *object_class;
    GtkCellRendererClass *cell_class;

    object_class  = G_OBJECT_CLASS (klass);
    cell_class = GTK_CELL_RENDERER_CLASS (klass);

    object_class->finalize = empathy_cell_renderer_expander_finalize;

    object_class->get_property = empathy_cell_renderer_expander_get_property;
    object_class->set_property = empathy_cell_renderer_expander_set_property;

    cell_class->get_size = empathy_cell_renderer_expander_get_size;
    cell_class->render = empathy_cell_renderer_expander_render;
    cell_class->activate = empathy_cell_renderer_expander_activate;

    g_object_class_install_property (object_class,
                     PROP_EXPANDER_STYLE,
                     g_param_spec_enum ("expander-style",
                                "Expander Style",
                                "Style to use when painting the expander",
                                GTK_TYPE_EXPANDER_STYLE,
                                GTK_EXPANDER_COLLAPSED,
                                G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_EXPANDER_SIZE,
                     g_param_spec_int ("expander-size",
                               "Expander Size",
                               "The size of the expander",
                               0,
                               G_MAXINT,
                               12,
                               G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_ACTIVATABLE,
                     g_param_spec_boolean ("activatable",
                                   "Activatable",
                                   "The expander can be activated",
                                   TRUE,
                                   G_PARAM_READWRITE));

    g_type_class_add_private (object_class, sizeof (EmpathyCellRendererExpanderPriv));
}

static void
empathy_cell_renderer_expander_get_property (GObject    *object,
                        guint       param_id,
                        GValue     *value,
                        GParamSpec *pspec)
{
    EmpathyCellRendererExpander     *expander;
    EmpathyCellRendererExpanderPriv *priv;

    expander = EMPATHY_CELL_RENDERER_EXPANDER (object);
    priv = GET_PRIV (expander);

    switch (param_id) {
    case PROP_EXPANDER_STYLE:
        g_value_set_enum (value, priv->expander_style);
        break;

    case PROP_EXPANDER_SIZE:
        g_value_set_int (value, priv->expander_size);
        break;

    case PROP_ACTIVATABLE:
        g_value_set_boolean (value, priv->activatable);
        break;

    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    }
}

static void
empathy_cell_renderer_expander_set_property (GObject      *object,
                        guint         param_id,
                        const GValue *value,
                        GParamSpec   *pspec)
{
    EmpathyCellRendererExpander     *expander;
    EmpathyCellRendererExpanderPriv *priv;

    expander = EMPATHY_CELL_RENDERER_EXPANDER (object);
    priv = GET_PRIV (expander);

    switch (param_id) {
    case PROP_EXPANDER_STYLE:
        priv->expander_style = g_value_get_enum (value);
        break;

    case PROP_EXPANDER_SIZE:
        priv->expander_size = g_value_get_int (value);
        break;

    case PROP_ACTIVATABLE:
        priv->activatable = g_value_get_boolean (value);
        break;

    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    }
}

static void
empathy_cell_renderer_expander_finalize (GObject *object)
{
    (* G_OBJECT_CLASS (empathy_cell_renderer_expander_parent_class)->finalize) (object);
}

GtkCellRenderer *
empathy_cell_renderer_expander_new (void)
{
    return g_object_new (EMPATHY_TYPE_CELL_RENDERER_EXPANDER, NULL);
}

static void
empathy_cell_renderer_expander_get_size (GtkCellRenderer    *cell,
                    GtkWidget          *widget,
                    const GdkRectangle *cell_area,
                    gint               *x_offset,
                    gint               *y_offset,
                    gint               *width,
                    gint               *height)
{
    EmpathyCellRendererExpander     *expander;
    EmpathyCellRendererExpanderPriv *priv;
    gfloat xalign, yalign;
    guint xpad, ypad;

    expander = (EmpathyCellRendererExpander *) cell;
    priv = GET_PRIV (expander);

    g_object_get (cell,
              "xalign", &xalign,
              "yalign", &yalign,
              "xpad", &xpad,
              "ypad", &ypad,
              NULL);

    if (cell_area) {
        if (x_offset) {
            *x_offset = xalign * (cell_area->width - (priv->expander_size + (2 * xpad)));
            *x_offset = MAX (*x_offset, 0);
        }

        if (y_offset) {
            *y_offset = yalign * (cell_area->height - (priv->expander_size + (2 * ypad)));
            *y_offset = MAX (*y_offset, 0);
        }
    } else {
        if (x_offset)
            *x_offset = 0;

        if (y_offset)
            *y_offset = 0;
    }

    if (width)
        *width = xpad * 2 + priv->expander_size;

    if (height)
        *height = ypad * 2 + priv->expander_size;
}

static void
empathy_cell_renderer_expander_render (GtkCellRenderer      *cell,
                      cairo_t *cr,
                      GtkWidget            *widget,
                      const GdkRectangle   *background_area,
                      const GdkRectangle   *cell_area,
                      GtkCellRendererState  flags)
{
    EmpathyCellRendererExpander     *expander;
    EmpathyCellRendererExpanderPriv *priv;
    gint                            x_offset, y_offset;
    guint                           xpad, ypad;
    GtkStyleContext                 *style;
    GtkStateFlags                    state;

    expander = (EmpathyCellRendererExpander *) cell;
    priv = GET_PRIV (expander);

    empathy_cell_renderer_expander_get_size (cell, widget,
                        (GdkRectangle *) cell_area,
                        &x_offset, &y_offset,
                        NULL, NULL);

    g_object_get (cell,
              "xpad", &xpad,
              "ypad", &ypad,
              NULL);

    style = gtk_widget_get_style_context (widget);

    gtk_style_context_save (style);
    gtk_style_context_add_class (style, GTK_STYLE_CLASS_EXPANDER);

    state = gtk_cell_renderer_get_state (cell, widget, flags);

    if (priv->expander_style == GTK_EXPANDER_COLLAPSED)
        state |= GTK_STATE_FLAG_NORMAL;
    else
        state |= GTK_STATE_FLAG_ACTIVE;

    gtk_style_context_set_state (style, state);

    gtk_render_expander (style,
                 cr,
                 cell_area->x + x_offset + xpad,
                 cell_area->y + y_offset + ypad,
                 priv->expander_size,
                 priv->expander_size);

    gtk_style_context_restore (style);
}

static gboolean
empathy_cell_renderer_expander_activate (GtkCellRenderer      *cell,
                    GdkEvent             *event,
                    GtkWidget            *widget,
                    const gchar          *path_string,
                    const GdkRectangle   *background_area,
                    const GdkRectangle   *cell_area,
                    GtkCellRendererState  flags)
{
    EmpathyCellRendererExpanderPriv *priv;
    GtkTreePath                    *path;

    priv = GET_PRIV (cell);

    if (!GTK_IS_TREE_VIEW (widget) || !priv->activatable)
        return FALSE;

    path = gtk_tree_path_new_from_string (path_string);

    if (gtk_tree_path_get_depth (path) > 1) {
        gtk_tree_path_free (path);
        return TRUE;
    }

    if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (widget), path)) {
        gtk_tree_view_collapse_row (GTK_TREE_VIEW (widget), path);
    } else {
        gtk_tree_view_expand_row (GTK_TREE_VIEW (widget), path, FALSE);
    }

    gtk_tree_path_free (path);

    return TRUE;
}